DALE STREET BROOKVALE NSW

This Brookvale site has a very high water table four metres below ground level, so a building construction technique was devised to meet the twin objectives of managing the water table, while at the same time producing a building with the desired hi-tech presentation.

Considering the depth of the excavation that was required for the basement car park, the only practical means of construction for the below ground works was to develop a design based on top down construction.

As a design team we decided that the best, most cost effective material to achieve the architectural requirements for the upper floors would be to use structural steel in combination with the structural decking slabs and concrete Tilt-Up wall panels for the three walls not facing the road.

In combination with the top down construction, this presented the builder with a number of attractive options to minimise construction time.

By utilising composite construction of steel and concrete, the structural steel sizes could be minimised.

This in turn led to a significant reduction in the extent of substructure and geotechnical works to the site, and the associated timeframe for these works - when compared with concrete construction

Once structural steel had been adopted for the framing of the upper floors it became apparent that a number of economies could be achieved due to the simplicity of the building with steel.

To save construction time, the large two-storey basement car park was built after the upper structure. This allowed work above ground and under ground to be constructed simultaneously.

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